SN8F5708 datasheet(98/204 Pages) SONIX

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SN8F5708 Series

Timer 2

Datasheet Rev. 2.4

15.6

Sample Code

The following sample code demonstrates how to perform T2 compare function with interrupt.

#define T2ClkFcpu

(1 << 0) //T2 clock from Fcpu

#define T2ClkPin

(2 << 0) //T2 clock from T2 pin

#define T2ClkGate

(3 << 0) //T2 clock from Fcpu with T2 pin gating

#define T2Fcpu12

(0 << 7) //T2 clock = Fcpu/12

#define T2Fcpu24

(1 << 7) //T2 clock = Fcpu/24

#define T2RLMode0

(2 << 3) //T2 reload mode0 = auto-reload

#define T2RLMode1

(3 << 3) //T2 reload mode1 = T2RL falling edge trigger

#define ComMode0

(0 << 2) //Compare mode = directly method

#define ComMode1

(1 << 2) //Compare mode = indirectly output method

#define T2COM0EdNE

(0 << 6) //T2COM0 interrupt edge = no equle CRC

#define T2COM0EdE

(1 << 6) //T2COM0 interrupt edge = equle CRC

#define T2COM0En

(2 << 0) //T2COM0 compare funcion enable

#define T2COM1En

(2 << 2) //T2COM1 compare funcion enable

#define T2COM2En

(2 << 4) //T2COM2 compare funcion enable

#define T2COM3En

(2 << 6) //T2COM3 compare funcion enable

void InitT2(void)

{

// T2_Initial

TH2 = 0x00;

TL2 = 0x00;

CRCH = 0x80;

CRCL = 0x00;

CCH1 = 0xC0;

CCL1 = 0x00;

CCH2 = 0xE0;

CCL2 = 0x00;

CCH3 = 0xF0;

CCL3 = 0x00;

// T2 clock from Fcpu/24 with T2 pin gating

// Reload mode1 = T2RL falling edge trigger

// Compare mode = directly method

// T2COM0 interrupt trigger = equle CRC

// Compare function T2COM0/1/2/3 enable

CCEN |= T2COM0En | T2COM1En | T2COM2En | T2COM3En;

// P23(T2)/P22(T2RL) is input mode with pull-high resister

P2M &= 0xF3;

P2UR &= 0x0C;

// Enable T2RL/T2COM0/1/2/3 interrupt

IEN1 |= 0xBC;

// Enable total/Timer2 interrupt

IEN0 |= 0xA0;

P0 = 0x00;

P0M = 0x3F;

}

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